std::wbuffer_convert::wbuffer_convert
STD：：WBuffer[医]转换：：wBuffer[医]转换
| explicit wbuffer_convert( std::streambuf* bytebuf = 0, Codecvt* pcvt = new Codecvt, state_type state = state_type() | (1) | |
|---|---|---|
| wbuffer_convert(const std::wbuffer_convert&) = delete; | (2) | (since C++14) |
1%29构造wbuffer_convert对象具有指定的基础字节流(指定)。codecvt方面和指定的初始转换状态%28所有参数都是可选的%29。
2%29复制构造函数被删除，wbuffer_convert不是CopyConstructible
参数
| bytebuf | - | pointer to std::streambuf to serve as the underlying narrow character stream |
|---|---|---|
| pcvt | - | pointer to a standalone (not managed by a locale) std::codecvt facet. The behavior is undefined if this pointer is null. |
| state | - | the initial value of the character conversion state |
例
二次
#include <iostream>
#include <sstream>
#include <locale>
#include <codecvt>
int main()
{
// wrap a UTF-8 string stream in a UCS4 wbuffer_convert
std::stringbuf utf8buf(u8"z\u00df\u6c34\U0001f34c" // or u8"zß水?"
// or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9f\x8d\x8c";
std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv_in(&utf8buf
std::wistream ucsbuf(&conv_in
std::cout << "Reading from a UTF-8 stringbuf via wbuffer_convert:\n";
for(wchar_t c; ucsbuf.get(c )
std::cout << std::hex << std::showbase << c << '\n';
// wrap a UTF-8 aware std::cout in a UCS4 wbuffer_convert to output UCS4
std::wbuffer_convert<std::codecvt_utf8<wchar_t>> conv_out(std::cout.rdbuf()
std::wostream out(&conv_out
std::cout << "Sending UCS4 data to std::cout via wbuffer_convert:\n";
out << L"z\u00df\u6c34\U0001f34c\n";
}
二次
产出：
二次
Reading from a UTF-8 stringbuf via wbuffer_convert produces
0x7a
0xdf
0x6c34
0x1f34c
Sending UCS4 data to std::cout via wbuffer_convert:
zß水?
二次
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